It is not yet known if McKellar will be able to dance her way through the pain or be forced to sit out the next round of live shows next week.

Earlier this season, “Star Wars” star Billy Dee Williams pulled out of the ballroom competition show due to a chronic back problem.

Other celebrities still in the competition for season 18 of “Dancing With the Stars” include former “Full House” actress Candace Cameron Bure, “Glee” star NeNe Leakes and Big Time Rush singer James Maslow.